finding the full path of the program which ran.

Hi All,

I m building a library which requires the full path of the program to
which it is linked. How could I do it?

I can't use argv for sure, because this requires user program to be
aware of the library.

The way to find should be portable.

Besides, argv[0] doesn't give the full path. And a program can be ran
using using relative path so, getting the full path is really a hard
process using argv[0].

For eg.
[Prasad@prasadjoshi test]$ cat a_program.c
#include<stdio.h>

void afun ()
{
printf ( "\nIn afun ().\n" );
}

int main ( int argc, char *argv[] )
{
char cwd[100] ;
//intitialize_call_graph ( argv[0] );
getcwd ( cwd, 100 ) ;
printf ( "\ncwd = %s, name = %s \n", cwd, argv[0] ) ;
afun () ;
}

[Prasad@prasadjoshi test]$ ./a.out
cwd = /home/Prasad/programs/c/lsp/test, name = ./a.out
In afun ().

[Prasad@prasadjoshi test]$ ../test/a.out
cwd = /home/Prasad/programs/c/lsp/test, name = ../test/a.out
In afun ().

[Prasad@prasadjoshi test]$ ../../lsp/test/a.out
cwd = /home/Prasad/programs/c/lsp/test, name = ../../lsp/test/a.out
In afun ().

[Prasad@prasadjoshi lsp]$ test/a.out
cwd = /home/Prasad/programs/c/lsp, name = test/a.out
In afun ().

There has to be some other way to do it.

Thanks and regards,
Prasad.

.

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